[SCSI] be2iscsi: Fix for kdump failure

This patch fixes the Kdump failure reported by Redhat wich was caused by
be2iscsi resetting the Chip when be2iscsi detects it is in crashdump mode. If
be2net was loaded before be2iscsi then this leaves be2net driver hanging on to
resources that the chip stopped recognising after the reset.

This patch replaces  chip reset with Function reset so that only the
particular function and not the whole chip is affected
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/be2iscsi/be_cmds.c

@@ -868,3 +868,22 @@ int be_cmd_iscsi_post_sgl_pages(struct be_ctrl_info *ctrl,
 		beiscsi_cmd_q_destroy(ctrl, NULL, QTYPE_SGL);
 	return status;
 }
+
+int beiscsi_cmd_reset_function(struct beiscsi_hba  *phba)
+{
+	struct be_ctrl_info *ctrl = &phba->ctrl;
+	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
+	struct be_post_sgl_pages_req *req = embedded_payload(wrb);
+	int status;
+
+	spin_lock(&ctrl->mbox_lock);
+
+	req = embedded_payload(wrb);
+	be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
+	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
+			   OPCODE_COMMON_FUNCTION_RESET, sizeof(*req));
+	status = be_mbox_notify_wait(phba);
+
+	spin_unlock(&ctrl->mbox_lock);
+	return status;
+}

drivers/scsi/be2iscsi/be_cmds.h

@@ -561,6 +561,8 @@ int be_cmd_iscsi_post_sgl_pages(struct be_ctrl_info *ctrl,
 				struct be_dma_mem *q_mem, u32 page_offset,
 				u32 num_pages);
 
+int beiscsi_cmd_reset_function(struct beiscsi_hba *phba);
+
 int be_cmd_wrbq_create(struct be_ctrl_info *ctrl, struct be_dma_mem *q_mem,
 		       struct be_queue_info *wrbq);
 

drivers/scsi/be2iscsi/be_main.c

@@ -4276,7 +4276,7 @@ static int __devinit beiscsi_dev_probe(struct pci_dev *pcidev,
 			gcrashmode++;
 			shost_printk(KERN_ERR, phba->shost,
 				"Loading Driver in crashdump mode\n");
-			ret = beiscsi_pci_soft_reset(phba);
+			ret = beiscsi_cmd_reset_function(phba);
 			if (ret) {
 				shost_printk(KERN_ERR, phba->shost,
 					"Reset Failed. Aborting Crashdump\n");